html{
  overflow-x:hidden
}
.nav{
  display: flex;
  height:64px;
  align-items: center;
  width: 1920px;
  background:rgba(17,17,17,1);
  color: #ffffff;
  justify-content: center;
  position: sticky;
  top: 0;
  z-index: 100;
}
.contain{
  display: flex;
  justify-content: space-between;
}
.left,.right{
  display: flex;
  align-items: center;
}
.left-first{
  margin-right: 45px;
  color: $blue;
}
.left-item{
  margin-right: 46px;
}
.right-item{
  margin-right: 67px;
}
.contain{
  width: 1724px - 100px;
}
.userImg{
  .iconfont{
    font-size: 36px;
  }
}